Heated Window Grid Wire Repair: Procedure

NOTE: Any breaks longer than 25 mm (1 inch) in one grid cannot be repaired. A new back window glass must be installed. Breaks equal to or shorter than 25 mm (1 inch) the heated back window grid wire can be successfully repaired by using the following procedure.

NOTE: The vehicle should be allowed to reach 16°C (60°F) or above.

Clean the repair area with denatured alcohol.
Place the grid line mask over the break aligning the cut-out slots on either side of the repair area.

Fig 1: Identifying Grid Line Mask Position Over Break Aligning Cut-Out Slots
Courtesy of FORD MOTOR CO.
Apply three coats of the epoxy to the repair area.
Remove the mask without disturbing the epoxy.
Use the heat gun to heat the repair area for 1 to 2 minutes at a distance of about 25-50 mm (1-2 inches). This procedure should heat the repair area to approximately 149°C (300°F).
The heated back window may be energized immediately after the repair. Optimum hardness and adhesion will occur after 24 hours. Do not disturb the repair area until that time.